Hot-air furnace.



A. OLOUGHLIN,

HOT m FURNAGE.

APPLICATION lFILI-l2() AUG. Z9, 190B. n jl @&@@m l Patente Aug. 25,11.9%,

3 SHEETS-SHEET 3.

WMM/Iba@ i idosgsss.

To all whom it' may concern.'

' UNITED srrarns A,iiiiirniair onirica.

aman jofnouenmn', y or sr. rant, invriinnso'ra.

noir-ain nommen Specication of Letters ratent.Y

Patented Aug.' 25, 1914.

y application magi augustin, lacs. seminaesasti.

Be it known that ll, ALLAN Ulliopeimn, a subject of the King of GrreatBritain and llrelandf, residing at St. Paul, in the county of Ramsey andState of Minnesota, have invented certain `.new and useful improve mentsin Hot-Air Furnaces, of which ythey following is a specification.

My invention relates to improvements in hot air heating furnaces, itsobject being to provide a furnace by which the air from the rooms may bereadily purified, heated and returned to the room..v y

'llo this end my invention lconsists in the features of construction,combination and arrangement of parts hereinafter larly described andclaimed. 4 A.

ln the accompanyingA drawings forming part of this specification, Figure1 is a vertical section through the middle of the furnace on line w-fwof Fig. 4, Fig. 2 is a topview partly broken away,4 Fig. 3 is a verticalsection through the cap, Fig. 4 is a frag- 1n the drawings A representsthe ash pit,

B the fire box or pot and' C the smoke travelof the furnace. The smoketravel is snpported upon the dome 2 and runs circularly around it. Itcommunicates with the Icombustion chamber through a passage 3, and

has a smoke arm 4 through which ythe smoke 4 is discharged into' thechimney. I The ash pit is supported above the bottom of the furnacestructure b Walls 5 and 6. The wall 6 constitutes the inner Wall of thewater receptacle 7 which extends around on three sides of the furnace asshown in Fig. 7. The wall 6 is formed at the top with an outwardlyflared: flange 8 which extends up beyond the bottom of the ash pit inorder to carry and direct the current of air which enters the chamber 11through the inlet pipe 10 up above the top fof the water receptacle andabove the lower end of the artition wall 9 as hereinafter pointed out.he side wall 6 is formed near its point of union with the flange 8 withVopenings through which the air passes up between the Harige and wall 13of the ash pit into the flue or chamber 12. The openings between theflange 8 -outer` shell 17 of the furnace.

' and the wall 13 of the ash pit, as shown in Fig. 1; thus constituteports leadingffrom f below the ash pit to the chamber 12. ./f

4 ,'lhe receptacle 7 is formed at its top with cross bars 14 upon whichis supported a curved strip 15 forming a support for the lower end ofthe'partition wall 9. 'lhe partition wall 9 is interspaced from the hrebon and combustion chamber to constitute the intermediate chamber 12 andis secured at its front to the outwardly Haring side walls of the frontcasting 16 of the furnace.

Also Secura-icl'v torlthe; front casting 16 is the Ilihis is secured toor rests upon the top of the outer wall of the receptacle 7 and isinterspaced from the partition wall 9to constitute an ntermediatechamber or Hue 24.

rlhe cap 18 of the furnace fits over and rests upon the outer shell 17and the partition 9 as shown in Fig. 1. The cap carries .onitslunderside a number yof radial partitions 19 which extend downwardlyto rest upon the smoke travel C. Thus the hot air chamber above the domeis divided by these radial partitions into a plurality of separatechambers or passages. Above each chamber the cap is formed with anoutlet port 20 4from which a pipe may lead to the room to `be heated.The top of the cap is also formed with a plurality of ports 22 whichcommunicate with the chamber 24 between the walls 9 and 17. t

ln use the fresh air enters through the pipe 10 and passes thencethrough the chamber 11 and into the chamber 12 between the Wall 13 ofthe {ire-pot and the partition 9.

vIt becomes heated by reason of its contact with, and proximity to, theside wall of the fire-pot, and passes up around the smoker- `travel intoone of the segmental chambers of the cap, and thence through outlet port20. After it has done its Work and lost `part of its heat, it passesfrom the room y down through the return port 22 into the chamber 24between the partition 9 and the outer shell 17 of the furnace. Beingcolder than the air inthe chamber 12, it will pass to the bottom of thechamber or Hue 24, and around under the bottom of the partition 9 and upinto the chamber 12 where it mingles with the freshly entering air andascends again to the rooms to be heated. In passing under the partition9, it is brought into contact with the water in the receptacle. Thisremoves the dust and moistens the air. The

old air may be drawn from the rooms and furnace through a dampered pipeleading from the chamber 24 into the outside air.

I claim:

1'. A furnace comprising a re pot, an inner shell outside the re pot andspaced apart therefrom to form a hot air chamber, an outer shellextending around the inner shell and spaced apart therefrom to form areturn chamber for the air', the hot air. chamber having an inlet portnear the bottom for the entrance of fresh air and an outlet at the topfor the discharge of heated air to the rooms to be heated, and thereturn chamber having an inlet port at the top for the return of airfrom the rooms, and a Water receptacle extending around under, thebottoms of both of said chambers, the 4Wall constituting the inner shellterminating short of the top of the-Water receptacle s0 as to permit thereturning air in the outer chamber to pass between the loWer end of theshell and the `top of the receptacle to the hot-air chamber.

2. A furnace comprising ag'fire box, interspaced concentric Walls arbundthe lire box forming inner and outer chambers, .said chamberscommunicating at their lower ends and the inner chamber having anopening near the bottom and on the side adjacent to the fire pot for theentrance of air to be heated andl the outer chamber having an inletopening at the top for the return of air, a Water receptacle beloW theloWer endsof said chambers and in communication therewith, and a captting over the'top of the inner chamber, said cap being formed on itsunderside With a plurality of separated passages and With anl outletport leading from each of said passages and adapted to receive a pipe.

`llntestimony.whereof I aiix my signature in presence of tWo Witnesses.

ALLAN OLOUGHLIN.

Witnesses:

HAT'rrc SMITH,

/ ARTHUR P. LOTHROB.`

